Electric hoist.



G. RASMUS.

ELECTRIC HOI S T.

- APPLICATION FILED JANZH, 1908. I 898,782 Patented Sep t.15,1908.

2 SHEETS-SHEET '1.

.mwlMHHHHMWII WITNESSES] INVENTOH I W CZZZJCCZZZficZJV/lldef 'aym ATTORNEYS G. RASMUS. ELEO'I'RIQ HOIST. APPLICATION FILED mums, 1908.

4 Patented Sept. 15,, 1908.

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No. coarse.

To all whom it may concern:

Be it known that l, GUSTAV EASMUS, aciti- Zen of the United States, end a resident of the city of New York, borough of the Bronx, in the'county end State of New York, invented a new and lmcroved Electric Hoist I 4 of which the tollowing 1s a full, clear, and exact description. I

The invention relates to hoisting mac hes, and its object is to provide a new and improvet electric hoist hevin an. electric mo tor provided with a revolub e rrnature Lind e revoluble field, the latter being driven the said armature and forming the hoisting drum, so that the apparatus takes up very little room, requires no brelte mechanism and is exceedingly serviceable for use in overhced traveling cranes.

The invention consists of novel features and parts and combinations of the same, which will be more fully described hereinafter and then pointed out in the claims.

A practical embodiment of the invention ings forming a part of this specification, in which similar characters of reference indicate corresponding parts in both views.

Figure 1 is a side elevation of the improve ment, parts being shown in section, and Fig.

2 is atransverse section of the some on the line 22 of Fig. 1.

On the traveling beam A of an overhead. crane is mounted to travel the carriege so, in the frame of which isjournaled the electric motor shaft-C carrying an arrest l) sur rounded by magnets E arranged ithin the hoisting drum F, the latter thus forming the iield of the electric motor. The drum l is journeled in the motor frame concentric with the motor shaft C, and the said hoisting drum is driven from the armature l at a greatly reduced speed but'in the same direction, so as to increase the hoisting power of the drum F at the expense of the speed. For the purpose mentioned the following arrangement is made: On the motor-shaft C issecured a worm G in mesh with a WOIIIl Wheel G secured to a transversely-extending shaft H, journaled in suitable bearings arranged on the frame of the carriage B, and on the said shaft H is secured a bevel gear Wheel 1 in mesh With a bevel gear Wheel lfsstened on a longitudinally-extending shaft 3, journaled accompanying draw in suitable bearings arranged on the frame of carriage B. On the shaft 5 secured pinioiis lit in mesh with gear wheels F, secured to or formed on the hoisting drum F at the ends thereof, so that when motor is running the armature D drives the hoisting drum 1 at a greatly reduced speed but in the same direction in which the armature is running. Electricity is supplied to the. electric motor in the usual manner by the use of e brush and brush holder L to and through the primary commutator L of any an con 111651031.

cured Wheel N adapted to be turned by l in case the electric motor fails to work,

0 as, to allow turning the hoisting drum F iron]. the shaft C when the latter is rotated by the operator turning the menually-contrclled wheel N.

From the foregoing it will be seen that the electric hoist is rendered, exceedingly corniact, and the load is held suspended from the hoisting drum F "Whenever the letter is stopped, without the use of brake mechanism, owing to the ein ployment of the Worm G and Worm Wheel (3 forming "part of the connectin the armature sheit C with the driving shaft ffor the drum Having thus described my invention, I claim as new and desire to secure by Let-l rs Pateitt:

1. iii a device of the class described, a car.- riage, a drum journsled in the frame oi the carriage and provided at each end with geaie wheels, a shaft provided with an armature journaled in the drum,- said shaft having at one end a orm, a shaft journaled in the above the drum, and provided with pinions meshing with the gear Wheels, and on its end with a bevel gear Wheel, a shaft c1 range transversely of the drum, and provided with a Worm Wheel in mesh with the 'worm, and with a bevel gear Wheel in mesh with the fi st named bevel gear wheel, and

magnets Within the drum and connected roved thereto, and cooperating with the ermatureot' the shaft.

2. A device of the class described, coinprising a carriage, a. druin, iournaled in the frame of the carriage, a shalt provided with an armature journaled in the drum, and having at one end a worm, a shaft journaled in the frame above the drum, adriving connection between the shaft and the drum, e shaft In fiestir n'ony whereof I have signed my en'enged transversely of the drum, -& worm name to this speclfication in the presence of Wheel ihereon meshing with the Worm, & two subscribing Witnesses. 7 bevel gear ebnnectipn betieen the said shaft I GUSTAV RASMUS. ami the last named shaft, and magnets within Witnesses: abhe drum, and connected thereto and c06p- THEO. G. Hosmg, arming with the armature of the shaft. EVERARD B. MARSHALL. 

